the old man,__abroad for twenty years,is on the way back to his motherland.a.working b.having worked从哪可以看出来要选完成时?为什么不能是A?

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theoldman,__abroadfortwentyyears,isonthewaybacktohismotherland.a.workingb.havingworked从哪可以看出来要选完成时?为

the old man,__abroad for twenty years,is on the way back to his motherland.a.working b.having worked从哪可以看出来要选完成时?为什么不能是A?
the old man,__abroad for twenty years,is on the way back to his motherland.
a.working b.having worked
从哪可以看出来要选完成时?为什么不能是A?

the old man,__abroad for twenty years,is on the way back to his motherland.a.working b.having worked从哪可以看出来要选完成时?为什么不能是A?
for twenty years,这就表示应该用完成时,已经在海外工作了二十年了.

根据时间状语for twenty years,
working现在分词表示正在进行或现阶段正在进行的动作。
根据后边内容可判断现在不在work

work是延续性动词,当句中有for twenty years等表示一个连续的时间或过程时,就应该用完成时,如果用一般过去时只表示一个短暂的动作,与for twenty years不符

on the way back一词表明他已经不再在国外工作了吧，所以工作这个动作已经完成了。该用完成时。
而working一词表示正在工作，不可能说正在工作了二十年，所以时不正确的。^_^

the old man,__abroad for twenty years,is on the way back to his motherland.应该填having worked,在这里having worked abroad for twenty years作的是什么成分?为什么不是定语 the old man,__abroad for twenty years,is on the way back to his motherland.a.working b.having worked从哪可以看出来要选完成时?为什么不能是A? the old man born! The old man looks ( )is the old man? ( )is the old man? The old man __his glasses Who is the old man? The old man[ ][ ][ ]his son The old man has poor____. The old man lives ____charity the old man said （s The Old Man Down The Road 歌词 THE OLD MAN AND THE SEA怎么样 Let the old man( ) the bus first THE OLD MAN IN THE CORNER怎么样 the old man is ___for the beach the old man is（ ninety years old?）提问（）（）is the old man